David Cirielli — Villa Celina, Province of Buenos Aires

Official source account — 2021 annual report, printed page 46: David Cirielli recorded a light flashing at regular intervals from Villa Celina. CIAE and independent orbital specialists matched it to the tumbling main body of China's Long March 5B rocket, intermittently reflecting sunlight after carrying the Tianhe station module. The agency classified this identification Type A. The body heading dates the recording 1 May 2021, whereas the index says 19 April; both source dates are retained as an unresolved documentary conflict. The summaries distinguish reported observations from the agency’s proposed explanations. Source Type A/B ratings describe explanatory confidence and are not encounter classes.